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Opacity data for stellar models and its uncertainties

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2018
OSTI

Opacity data for stellar models and its uncertainties

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Ride-along data LOS 130, 170 & LO330 shots z3139, 3140 and 3141

Loisel, Guillaume P.

Each instrument records the x-ray emission from the Z-pinch dynamic hohlraum (ZPDH); LOS 130 TIXTLs instruments record the absorption of the pinch backlighter through an expanding NaF/Mg foil; LOS 170 MLM instruments record monochromatic images at 276 and 528 eV energies near and before ZPDH stagnation time; LOS 330 TREX 6A & B: recoded time resolved absorption spectra from a radiatively heated Ne gas.

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TYPE Other Report YEAR 2017
OSTIDOI

The Differential Absorption Hard X-Ray Spectrometer at the Z Facility

IEEE Transactions on Plasma Science

Bell, Kate S.; Coverdale, Christine A.; Ampleford, David A.; Bailey, James E.; Loisel, Guillaume P.; Harper-Slaboszewicz, V.H.; Schwarz, Jens S.; Moy, Kenneth

The differential absorption hard X-ray (DAHX) spectrometer is a diagnostic developed to measure time-resolved radiation between 60 keV and 2 MeV at the Z Facility. It consists of an array of seven Si PIN diodes in a tungsten housing that provides collimation and coarse spectral resolution through differential filters. DAHX is a revitalization of the hard X-ray spectrometer that was fielded on Z prior to refurbishment in 2006. DAHX has been tailored to the present radiation environment in Z to provide information on the power, spectral shape, and time profile of the hard emission by plasma radiation sources driven by the Z machine.

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TYPE Journal Article YEAR 2017
ScopusOSTIDOI

Measuring the radiative properties of astrophysical matter using the Z x-ray source

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Brief overview of opacity measurements for stellar interior conditions

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Systematic measurements of opacity dependence on temperature density and atomic number at stellar interior conditions

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Systematic search for spherical crystal X-ray microscopes matching 1-25 keV spectral line sources

Review of Scientific Instruments

Schollmeier, Marius; Loisel, Guillaume P.

Spherical-crystal microscopes are used as high-resolution imaging devices for monochromatic x-ray radiography or for imaging the source itself. Crystals and Miller indices (hkl) have to be matched such that the resulting lattice spacing d is close to half the spectral wavelength used for imaging, to fulfill the Bragg equation with a Bragg angle near 90∘ which reduces astigmatism. Only a few suitable crystal and spectral-line combinations have been identified for applications in the literature, suggesting that x-ray imaging using spherical crystals is constrained to a few chance matches. In this article, after performing a systematic, automated search over more than 9 × 106 possible combinations for x-ray energies between 1 and 25 keV, for six crystals with arbitrary Miller-index combinations hkl between 0 and 20, we show that a matching, efficient crystal and spectral-line pair can be found for almost every Heα or Kα x-ray source for the elements Ne to Sn. Using the data presented here it should be possible to find a suitable imaging combination using an x-ray source that is specifically selected for a particular purpose, instead of relying on the limited number of existing crystal imaging systems that have been identified to date.

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TYPE Journal Article YEAR 2016
ScopusOSTIDOI

Systematic measurements of opacity dependence on temperature density and atomic number at stellar interior conditions

Nagayama, Taisuke N.; Bailey, James E.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; MacFarlane, J.J.M.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pradham, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2016
OSTI

Systematic measurements of opacity dependence on temperature density and atomic number at stellar interior conditions

Bailey, James E.; Nagayama, Taisuke N.; Loisel, Guillaume P.; Rochau, G.A.; Blancard, C.B.; Colgan, J.C.; Cosse, Ph.C.; Faussurier, G.F.; Fontes, C.J.F.; Gilleron, F.G.; Golovkin, I.G.; Hansen, Stephanie B.; Iglesias, C.A.I.; Kilcrease, D.P.K.; Macfarlane, Joseph J.; Mancini, Roberto C.; Nahar, S.N.N.; Orban, C.O.; Pain, J.-C.P.; Pradhan, A.K.P.; Sherrill, M.S.; Wilson, B.G.W.

Abstract not provided.

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TYPE Conference Poster YEAR 2016
OSTI
Results 26–50 of 97
Results 26–50 of 97